EP0143357B1 - Dokumentenabtaster und optische Vorrichtung dafür - Google Patents

Dokumentenabtaster und optische Vorrichtung dafür Download PDF

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Publication number
EP0143357B1
EP0143357B1 EP84113138A EP84113138A EP0143357B1 EP 0143357 B1 EP0143357 B1 EP 0143357B1 EP 84113138 A EP84113138 A EP 84113138A EP 84113138 A EP84113138 A EP 84113138A EP 0143357 B1 EP0143357 B1 EP 0143357B1
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EP
European Patent Office
Prior art keywords
lens arrays
lenses
small lenses
rows
small
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84113138A
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English (en)
French (fr)
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EP0143357A1 (de
Inventor
Makoto Kato
Mitsuo Togashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic System Solutions Japan Co Ltd
Panasonic Holdings Corp
Original Assignee
Matsushita Graphic Communication Systems Inc
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP58204032A external-priority patent/JPS6096062A/ja
Priority claimed from JP58204033A external-priority patent/JPS6096063A/ja
Priority claimed from JP20403483A external-priority patent/JPS6095513A/ja
Application filed by Matsushita Graphic Communication Systems Inc, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Graphic Communication Systems Inc
Publication of EP0143357A1 publication Critical patent/EP0143357A1/de
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Publication of EP0143357B1 publication Critical patent/EP0143357B1/de
Expired legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/48—Picture signal generators
    • H04N1/486—Picture signal generators with separate detectors, each detector being used for one specific colour component
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0012—Arrays characterised by the manufacturing method
    • G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding

Definitions

  • the present invention relates to an optical device suitable for an image reading optical system such as a facsimile system or a document reader.
  • One of the major technical problems to be solved in scanning and photoelectrically converting an image using a one- or two-dimensional solid-state image sensor such as a CCD image sensor is suppression of the moire of a scanned image.
  • Figs. 1A and 1 B show waveforms for explaining how a moire is generated.
  • the photoelectric conversion output of each picture element of the solid-state image sensor has a moire in which a very strong contrast of three times or more between a maximum value V 3 and a minimum value V 1 is generated, as shown in Fig. 1 B.
  • reference symbol p denotes a picture-element pitch.
  • Figs. 2A and 2B show waveforms demonstrating the moire suppression effect obtained when a double image is formed and are similar to Figs. 1A and 1 B.
  • the solid line and the dotted line respectively show waveforms of a sinusoidal pattern of the incident light which is shifted by a displacement S corresponding to half the picture element pitch p in the scanning direction.
  • Fig. 2B shows the photoelectric conversion output of each picture element of the solid-state image sensor when such a double image is formed on the imaging surface 1.
  • the moire contrast is reduced.
  • the magnitude in accordance with an image pattern to be processed, a desired resolution, or the like.
  • a number of rod lenses of focusing light guides are arranged along the scanning .direction to form rod lens rows.
  • Light rays reflected from a document or the like are divided by these two rod lens arrays so as to form a double image having components with a predetermined displacement on an imaging surface of a sensor.
  • Fig. 3 shows a plan view showing a typical arrangement of color separation filters mounted on the imaging surface of a color image reading line image sensor. A number of openings are formed on the imaging surface at a rate of three per picture element and at a pitch of p/3. Red, green and blue transmission filters R, G and B are arranged on the respective openings in the order shown in Fig. 3. An image is separated into three colors by these filters and is read.
  • Fig. 4 is a plan view showing another arrangement of tricolor separation filters mounted on the imaging surface of a line image sensor.
  • a number of openings are formed at a rate of two per picture element, and the respective color transmission filters are arranged at a pitch of p/2 in the order of R, G, B, G, R, G, B, G, and so on.
  • Figs. 5A to 5C are illustrations for explaining misregistration. Assume a case wherein an erect image equal in size to a document consisting of a white region (denoted by W) and a black region (hatched region) connected in the horizontal scanning direction is formed on the imaging surface of a line image sensor shown in Fig. 5B. An image reproduced in accordance with a reading output from the line image sensor is shown in Fig. 5C. Referring to Fig. 5C, a blue region (denoted by B) of one picture-element width is formed at the boundary between a white region (denoted by W) and a black region (hatched region). This is caused by the following. Of openings 7, and 9 of the line image sensor corresponding to the boundary between the black and white regions of the document, only the opening 9 receives light (white light). Thus, this portion produces an output which is the same as that obtained from a blue image.
  • a quartz plate is arranged in front of the imaging surface on an image sensor as described above, and a double image of an incident image is formed by the birefringence of the quartz plate. This can be also performed by the tricolor tube method.
  • the present invention has been made accounting the above-mentioned shortcomings and has been made as its object to provide a stable and relatively inexpensive optical device which can be suitably adapted for forming double or a multiple erect image of equal size as that of an object on an imaging surface of a large image sensor.
  • an optical device wherein a plurality of two-dimensional lens arrays each consisting of at least two rows of small lenses are superimposed with each other between first and second planes, the distance between centers of adjacent small lenses of at least one lens array among said plurality of lens arrays is set to be different from that of the small lenses of the remaining lens arrays among said plurality of lens arrays, so that the lenses in the said at least one array are not completely coaxial with the lenses of the remaining lens arrays, and a multiple image of an optical image on a first plane is formed on an image surface on a second plane.
  • the distance between the optical axes can be set to be different along the row direction of the small lenses or in a direction perpendicular to the row direction of the small lenses.
  • a document reader can be realized wherein a multiple image of an optical image can be formed, on the imaging surface of a line image sensor of a document reader on which tricolor separation filters are arranged, by a lens system comprising a number of lens arrays in each of which a number of small lenses are arranged along the horizontal scanning direction to form at least two rows of small lenses, and a filter capable of transmitting light of only one color is inserted in the optical path of each optical image component constituting this multiple image, so that generation of moire is prevented and color misregistration of a color image prevented.
  • a document reader can be realized wherein, for example, a triple image of a document is formed as the multiple image using lens arrays each having three rows of small lenses, and a filtere capable of transmitting light of only single color is inserted in the optical path of each image component so that generation of moire is prevented and color misregistration is prevented.
  • a double image of a document is formed as an optical image using lens arrays each having two rows of small lenses, and a green transmitting filter and a magenta transmitting filter are respectively inserted in the optical paths of the two image components, so that the generation of moire and color misregistration are prevented and the reader is less in cost.
  • Fig. 6 is a sectional view schematically showing an optical system according to a first embodiment of the invention.
  • reference numerals 10, 11 and 12 denote two-dimensional lens arrays which are interposed between a plane of a document 13 and an imaging surface of a large sensor 14.
  • the lens arrays 10, 11 and 12 extend along a horizontal scanning direction X (perpendicularto the sheet of drawing).
  • X perpendicularto the sheet of drawing.
  • two rows of a number of small convex lenses are arranged parallel to each other.
  • reference numerals 10A, 11A and 12A denote small convex lenses of a first row of the lens arrays 10, 11 and 12, respectively; and 10B, 11B and 12B, small convex lenses of a second row of the lens arrays 10, 11 and 12, respectively.
  • Reference numerals 15, 16 and 17 denote apertured stops for adjusting the amount of incident light and for suppressing flare and extend in the horizontal scanning direction X.
  • Each stop 15, 16 and 17 has a number of apertures corresponding to the small lenses of the corresponding lens array 10, 11 or 12, respectively.
  • An erect image component of equal size to a point 19 on a document is formed on the imaging surface through the first and second rows of small convex lenses of the lens arrays 10, 11 and 12.
  • a distance between the optical axis of the small convex lenses of the first and second rows of the lens array 12 is increased (k + 5) as compared to a distance k between the optical axes of the small convex lenses between the first and second rows of the lens arrays 10 and 11.
  • the image components of the points 19 are formed at a point 20A on the imaging surface and on a point 20B thereon which is shifted from the point 20A by 6 (displacement) in the vertical scanning direction.
  • an erect double image of equal size to a document image is formed on the imaging surface. Therefore, when the displacement 6 is properly selected, the moire in the vertical scanning direction can be effectively suppressed.
  • the lens arrays 10, 11 and 12 as described above can be manufactured at low cost and high precision by a conventional plastic molding technique using a negative mold of a small convex lens group.
  • the lens arrays 10, 11 and 12 can be manufactured by fixing small convex lens components in a number of apertures formed in a plate.
  • the former method is considered to be advantageous.
  • Positioning of the lens arrays 10, 11 and 12 can be performed by means of positioning projections at a high precision of about 10 ⁇ m in the same manner as that for the distance between the optical axes of small convex lenses. This positioning is far easier than the case wherein inclination of rod lens arrays is adjusted in an optical device, thus simplifying a mechanism for positioning and maintaining a high positioning precision over a long period of time.
  • the optical axes of the small convex lenses of any lens array 10, 11 and 12 may be offset from those of the small convex lenses of the remaining lens arrays in the horizontal scanning and vertical scanning directions to suppress the moire in both the horizontal scanning and vertical scanning directions.
  • Fig. 7 shows this modification.
  • the small convex lenses 10A of the first row of the lens array 10 has the same pitch along the row direction as that of the small convex lenses 12A of the first row of the lens array 12. Therefore, the lenses of the first rows in the two arrays are vertically aligned.
  • the small convex lenses 12B of the second row of the lens array 12 are offset from the small convex lenses 10B of the second row of the lens array 10 in the row direction by 6y, and the distance between the first and second rows of the lens array 12 (distance between the optical axes of the lenses of the two rows) is increased by 6 x . Therefore, the small convex lenses 12B are arranged as indicated by the broken lines in Fig. 7. Note that the lens pitch in the row direction is the same in each lens array, and that 6 x is the offset amount in the horizontal scanning direction and 6y is the offset amount in the vertical scanning direction.
  • Fig. 8 is a schematic view schematically showing an optical device according to the second embodiment of the invention.
  • Reference numerals 21, 22, 23 and 24 are completely two-dimensional lens arrays without any projections or recesses, and are interposed between plane of a document 25 and an imaging surface of a large image sensor 26. These lens arrays 21, 22, 23 and 24 extend along the horizontal scanning direction X (perpendicular to the sheet of drawing).
  • X perpendicular to the sheet of drawing.
  • two rows of a number of small graded index type convex lenses are formed integrally in an inner surface of a flat glass plate by diffusing a substance having a refractive index different from that of the plate from its surfaces. Referreding to Fig.
  • reference numerals 21A, 22A, 23A and 24A denote graded index type lenses of the first rows of the lens arrays 21, 22, 23 and 24, respectively; and 21 B, 22B, 23B and 24B, graded index type lenses of the second rows of the lens arrays 21, 22, 23 and 24, respectively.
  • Reference numerals 27, 28 and 29 denote apertured stops for adjusting the amount of incident light and for suppressing moire and extend along the horizontal scanning direction X.
  • Each stop 27, 28 or 29 has a number of apertures 30 corresponding to the small lenses of the lens array 21, 22, 23 or 24.
  • the document 25 is fed by a document feeding roller 32 on a glass plate 31 in a vertical scanning direction Y.
  • the upper surface of the glass plate 31 is covered with a deposition film 34 of a wear-resistant material such as chromium except for the portion of a document reading slit 33.
  • erect image components of equal size to a point on the document are formed on the imaging surface through the first and second rows of small convex lenses of the lens arrays 21, 22,23 and 24.
  • a distance between the optical axis of the small convex lenses of the first and second rows of the lens arrays 23 and 24 is increased (k + 6) as compared to a distance k between the optical axis of the small convex lenses between the first and second rows of the lens arrays 21 and 22.
  • the image components of the point are formed at two points which are shifted by 6 (displacement) in the vertical scanning direction.
  • an erect double image of equal size to a document image is formed on the imaging surface. Therefore, when the displacement 6 is properly selected, the moire in the vertical scanning direction can be effectively suppressed.
  • the focal length of the small lenses of each lens array, the aperture diameter, the distance between the respective lens arrays, the positions of the apertured stops and the like in each embodiment can be easily determined in accordance with an intended application of an optical device in accordance with a conventional measurement technique taking geometrical optics and wave optics into consideration.
  • Fig. 9 is a perspective view schematically showing a document reader according to a further embodiment of the invention.
  • reference numeral 41 denotes a line image sensor. Openings 42, 43 and 44,... are aligned in the imaging surface of the sensor 41 along the horizontal scanning direction X. Three color separation filters shown in Fig. 3 are formed on the imaging surface.
  • Reference numeral 45 denotes a lens system for forming a triple erect image of equal size along a scanning line X3--X,' on the document image surface; and reference numeral 46 denotes a filter plate.
  • the lens system 45 comprises three two-dimensional lens arrays 47, 48 and 49.
  • a number of small convex lenses are formed on a plate and are aligned along the horizontal scanning direction X so as to constitute three rows.
  • Reference numerals 47A, 48A and 49A denote small convex lenses of first rows, respectively; 47B, 48B and 49B, small convex lenses of second rows, respectively; and 47C, 48C and 49C, small convex lenses of third rows, respectively.
  • the vertically corresponding small lenses of the second rows of the lens arrays 47, 48 and 49 have the identical optical axes.
  • a point image 53 on the scanning line X 3- X 3 ' is focused by the small lenses of the second rows to form a green erect image of equal size in the opening 43 corresponding to a picture element of the line image sensor 41.
  • the small lenses of the first and third rows of at least one lens array are offset by p/3 in a direction opposite to the horizontal scanning direction and in the horizontal scanning direction with respect to the second row of this lens array, so that the point image 53 is focused to form an erect image of equal size in the red opening 42 through the small lenses of the first rows and is focused to form an erect image of equal size in the blue opening 44 through the small lenses of the third rows.
  • the filter plate 46 has a red transmission filter 50 arranged to be parallel to the small lenses of the first row of the lens array 49, a green transmission filter 51 arranged to be parallel to the small lenses of the second row thereof, and a blue transmission filter 52 arranged to be parallel to the small lenses of the third row thereof.
  • a document image (Fig. 10A) having a black region (hatched portion) and a white region (represented by W) which are continuous along the horizontal scanning direction X is focused at illustrated positions (Fig. 10C) of the openings of the imaging surface of the line image sensor 41 through the lens system 45 and the filters 50 to 52 shown in Fig. 10B
  • openings 60 to 62 receive only light components which are not transmitted through the corresponding filters, and outputs through these openings 60 to 62 represent a black state.
  • Openings 63 to 65 receive light components passing through the corresponding filters, so that outputs through the openings 63 to 65 represent a white state. Therefore, an image reproduced by the output from the line image sensor is shown in Fig. 10D.
  • a blue portion is not formed at the boundary between the black and white portions.
  • the above effect is not limited to the above embodiment, but can be extended for a document image having any pattern and any color distribution.
  • the adjacent red, blue and green openings in the imaging surface of the line image sensor generate signals obtained by tricolor separating a dot image. As a result, color misregistration in a tricolor tube television camera can be prevented.
  • FIG. 11 A to 16D each of Figs. 11 A, 12A, 13A, 14A, 15A and 16A shows a document image surface. Portions 53a, 53b and 53c constitute one picture element. The next picture element is constituted by portions 53a', 53b' and 53c'.
  • Each of Figs. 11 B, 12B, 13B, 14B, 15B and 16B shows a transmission filter.
  • Reference numeral 50R denotes a filter for transmitting red light; and 51G and 52B, filters for transmitting green light and blue light, respectively.
  • the image output is gotten only when these tricolor filters are arranged such that the red filter 51 G is located immediately under the point to be read, as shown in Fig. 9. Therefore, although the three filters 50R, 51G and 52B are illustrated as if they are actually displaced, as shown in Figs. 11A to 16D, they are actually fixed in position.
  • the positions in Figs. 11 B, 128,... and 16B are given for illustrative convenience so as to explain reading at the respective points.
  • Each of Figs. 11C, 12C, ... and 16C shows the filter on the line image sensor.
  • the filters 50R, 51G and 51B are fixed on the line image sensor at a pitch of p/3.
  • Each of Figs. 11 D, 12D, ... and 16D shows the output state of the read point.
  • Figs. 11A to 11D show reading of light emitted from one point 53a.
  • the light from the point 53a is focused by the optical system of this embodiment at three points 59, 60 and 61.
  • the light from the point 53a represents the "black” state and will not be transmitted by any filter shown in Fig. 11 B. Therefore, a sensor output represents the "black” state.
  • Figs. 12A to 12D show reading of light emitted from one point (black) 53b. In this case, this light is not transmitted through any transmission filter in Fig. 12B, so that an image sensor output represents the "black" state.
  • Figs. 13A to 13D show reading of light emitted from one point (white) 53c.
  • the light represents the "white state”
  • R, G and B transmitted light components in an order named are filtered through the corresponding transmission filters shown in Fig. 13B.
  • the filter components in Fig. 13C only transmit the G, B and R components in the order named. As a result, the image sensor will not generate any output (this represents the "black” state).
  • Figs. 14A to 14D show reading of light emitted from one point 53a' in the next picture element. Since the light from the point 53a' represents the "white" state, R, G and B components in the order named are transmitted through the transmission filters in Fig. 14B. However, filters 62, 63 and 64 located at the imaging points transmit B, R and G components in the order named, so that no output is generated from the image sensor.
  • Figs. 15A to 15D show reading of light emitted from one point (white) 53b'.
  • R, G and B components in the order named are transmitted through the transmission filter components in Fig. 15B. Since corresponding filter components 63, 64 and 65 transmit R, G and B components in the order named, the image sensor generates a one-pitch image sensor picture-element output which represents the "white" state.
  • Figs. 16A to 16D show reading of light emitted from one point (white) 53c'.
  • R, G and B components in the order named are transmitted through the transmission filter components shown in Fig. 16B.
  • the corresponding filter components 64, 65 and 66 transmit G, B and R components in the order named, so that no output is generated from the image sensor.
  • Fig. 17 shows all outputs shown in Figs. 11A to 16D.
  • reference symbol F11 denotes a "black” output (the same output is obtained when no signal is generated) in Figs. 11A to 11 D.
  • Reference symbol f15 denotes a "white” output.
  • outputs f13 and f14 represent "black” outputs, respectively, as can be seen in association with an output f15, only a color output is obtained when the "black” outputs are obtained together with this color output. In fine, the black or white signal is obtained for every picture element (pitch p) of the image sensor.
  • the lens arrays 47, 48 and 49 are prepared by using a negative mold of small convex lenses with high precision and at low cost in accordance with a conventional plastic molding technique.
  • small lenses may be fixed in openings formed in a plate, respectively.
  • the former method is preferred in favor of the packing density and low fabrication cost.
  • the lens system 45 has three two-dimensional lens arrays. However, two lens arrays or four or more lens arrays may be used. In this case, when three or more lens arrays are used, aberration and a distance between the object and the image can be decreased.
  • Fig. 18 is a perspective view schematically showing a document reader according to a still further embodiment of the invention.
  • a substance having a refractive index different from that of a flat glass plate is diffused from the surfaces of the flat glass plate to form small graded index type convex lenses 70 along the horizontal scanning direction X so as to constitute a lens array having three rows of lenses.
  • a lens system 45 is obtained by using four two-dimensional lens arrays 71 to 74 obtained in this manner. Filters 50 to 52 are adhered to the lower surface of the lens array 74.
  • Fig. 19 is a perspective view schematically showing a document reader according to a still further embodiment of the invention.
  • reference numeral 81 denotes a line image sensor. Openings 82, 83, 84, 85,... are formed in the imaging surface along the horizontal scanning direction X. Three color separation filters having the arrangement in Fig. 4 are formed on the openings 82, 83, 84, 85, ... in the imaging surface.
  • Reference numeral 86 denotes a lens system for focusing a double image on the scanning line Xg-X3'on the document image surface to form an erect image of equal size.
  • Reference numeral 87 denotes a filter plate.
  • the lens system 86 comprises three two-dimensional lens arrays 88, 89 and 90.
  • Each of the lens arrays 88,89 and 90 has a number of small convex lenses aligned on a plate along the horizontal scanning direction X so as to constitute two rows.
  • Reference numerals 88A, 89A and 90A denote small convex lenses of a first row, respectively; 88B, 89B and 90B, small convex lenses of a second row, respectively.
  • the optical axes of the small lenses of the second row (or the first row) on the lens array 90 are offset by p/2 (p/3 in the case of the filter arrangement in Fig. 3) from those of the small lenses of the second rows of the lens arrays 88 and 89.
  • the lens arrays 88, 89 and 90 are prepared by using a negative mold of small convex lenses with high precision and at low cost in accordance with a conventional plastic molding technique.
  • small lenses may be fixed in openings formed in a plate, respectively.
  • the former method is preferred in favor of the packing density and low fabrication cost.
  • the lens system 86 has three two-dimensional lens arrays. However, two lens arrays or four or more lens arrays may be used. In this case, when three or more lens arrays are used, aberration and a distance betwen the object and the image can be decreased.
  • the filters 91 and 92 may be directly formed by deposition or the like on the lens array.
  • Fig. 20 is a perspective view schematically showing a document reader according to a further embodiment of the invention.
  • a substance having a refractive index different from that of a flat glass plate is diffused from the surfaces of the flat glass plate to form small graded index type convex lenses 100 along the horizontal scanning direction X so as to constitute a lens array having three rows of lenses.
  • a lens system 86 is obtained by using four two-dimensional lens arrays 101 to 104 obtained in this manner. Filters 91 and 92 are adhered to the lower surface of the lens array 104.
  • optical components are omitted.
  • the following components are used in the document reader: a white light source for illuminating a document surface image, a slit member arranged between the lens system and the document image, and an apertured stop arranged in the lens system so as to prevent degradation (flare) of the image which is caused by transmission of light between the lenses of the lens arrays and to obtain a uniform image intensity distribution.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Scanning Arrangements (AREA)

Claims (14)

1. Optische Vorrichtung, dadurch gekennzeichnet, daß eine Anzahl zweidimensionaler Linsenanordnungen (10 bis 12; 21 bis 24; 47 bis 49; 71 bis 74; 88 bis 90; 101 bis 104), die jeweils zumindest aus zwei Reihen kleiner Linsen bestehen, zwischen ersten und zweiten Ebenen einander überdeckend angeordnet sind, daß der Abstand (k + 5) zwischen der Mitte benachbarter kleiner Linsen zumindest einer Linsenanordnung (12; 23, 24; 49; 73, 74; 90; 103, 104) unter der Anzahl Linsenanordnungen so eingestellt ist, daß er von dem Abstand der kleinen Linsen der verbleibenden Linsenanordnungen unter der Anzahl Linsenanordnungen verschieden ist, so daß die Linsen zumindest in der einen Anordnung (12; 23, 24; 49; 73, 74; 90; 103, 104) nicht vollständig koaxial zu den Linsen der verbleibenden Linsenanordnung sind, und eine Sammelaufnahme eines optischen Bildes in einer ersten Ebene (13) auf einer Abbildungsfläche einer zweiten Ebene (14) erzeugt wird.
2. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand zwischen der Mitte benachbarter kleiner Linsen in einer ersten Reihe (12A, 12B) kleiner Linsen der zumindest einen Linsenanordnung (12) so eingestellt ist, daß er derselbe wie der Abstand der verbleibenden Reihen aus kleinen Linsen der zumindestens einen Linsenanordnung ist, und daß eine n-te Reihe kleiner Linsen der zumindest einen Linsenanordnung (12) mit demselben Abstand zwischen den Mitten benachbarter Linsen wie demjenigen der n-ten Reihen der verbleibenden Linsenanordnungen (10, 11) angeordnet ist und davon in einer vertikalen Abtastrichtung um Ov versetzt ist, wobei 6y eine Versatzgröße der kleinen Linsen in einer vertikalen Abtastrichtung Y ist.
3. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jeder Abstand zwischen Mitten benachbarter Linsen in der ersten bis n-ten Reihe kleiner Linsen in zumindest der einen Linsenanordnung (12) derselbe ist wie derjenige in den ersten bis n-ten Reihen der verbleibenden Linsenanordnungen (10, 11), und daß ein Abstand zwischen den benachbarten Reihen Linsen der zumindest einen Linsenanordnung (12) um δY. verschieden ist von dem Abstand zwischen den Reihen kleiner Linsen der verbleibenden Linsenanordnung (10, 11), wobei iSv eine Versatzgröße der kleinen Linsen in einer vertikalen Abtastrichtung Y ist.
4. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand zwischen Mitten benachbarter kleiner Linsen in der ersten bis n-ten Reihe kleiner Linsen zumindest der einen Linsenanordnung (12; 49) derselbe ist wie derjenige in den ersten bis n-ten Reihen kleiner Linsen der verbleibenden Linsenanordnung (10, 12; 47, 48), daß kleine Linsen der n-ten Reihe der zumindest einen Linsenanordnung (12; 49) bezüglich kleiner Linsen der n-ten Reihe der restlichen Linsenanordnungen (10, 11; 47, 48) um eine Versatzgröße 5x in horizontaler Abtastrichtung versetzt ist, und daß ein Abstand zwischen den Reihen kleiner Linsen der zumindest einen Linsenanordnung (12; 49) um 6y von dem Abstand in den restlichen Linsenanordnungen (10, 11; 47, 48) verschieden ist.
5. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die erste Ebene (13) eine Oberfläche einer Vorlage oder einer Abbildungsfläche eines festzustellenden Bildes ist, und die zweite Bildebene (14) eine Abbildungsfläche eines Bildsensors ist.
6. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Anzahl Linsenanordnungen (10 bis 12; 47 bis 49; 88 bis 90) aus einer Gruppe einteilig geformter, kleiner, konvexer Linsen besteht.
7. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jede der Anzahl Linsenanordnungen (71 bis 74) so ausgebildet ist, daß die kleinen Linsen (70) in einer Innenfläche einer glatten, ebenen Glasplatte als Einheit ausgebildet sind, indem eine Substanz mit einem Brechungsindex der sich von demjenigen eines Glases der Glasplatte unterscheidet, von Oberflächen der Platte aus diffundiert wird.
8. Optische Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß dreifarbige Trennfilter (42 bis 44) in deren Abbildungsfläche in einer horizontalen Abtastrichtung entsprechend Bildelementen angeordnet sind, daß eine Anzahl Linsenanordnungen (47 bis 49), in welchen jeweils eine Vielzahl kleiner Linsen entlang der horizontalen Abtastrichtung angeordnet sind, um zumindest zwei Reihen kleiner Linsen zu bilden, wobei die Abstände zwischen den optischen Achsen der kleinen Linsen in der Anzahl Linsenanordnungen (47 bis 49) so eingestellt sind, daß ein Sammelbild mit Komponenten, die um eine vorherbestimmte Größe in der horizontalen Abtastrichtung verschoben sind, auf der Abildungsfläche (41) ausgebildet ist, wobei die Linsen in zumindest einer der Anzahl Linsenanordnungen nicht vollständig koaxial bezüglich der Linsen der restlichen Linsenanordnungen sind, und Filter (50 bis 52) vorgesehen sind, die jeweils im Strahlengang der Reihen kleiner Linsen jeder der Anzahl Linsenanordnungen (47 bis 49) angeordnet sind, und wobei jedes Filter Licht nur der entsprechenden Farbe durchläßt, und die Anzahl Linsenanordnungen (47 bis 49) entlang einer Richtung der optischen Achse der kleinen Linsen einander überdeckend angeordnet sind.
9. Optische Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Anzahl Linsenanordnungen (47 bis 49) eine Gruppe von Linsenanordnungen aufweisen, in welchen jeweils eine Vielzahl kleiner Linsen in der horizontalen Abtastrichtung angeordnet sind, um drei Reihen kleiner Linsen zu bilden, wobei die Gruppe Linsenanordnung ein Sammelbild einer Vorlage auf der Abbildungsfläche (41) erzeugt, welches Sammelbild Bestandteile aufweist, welche um eine vorherbestimmte Größe in der horizontalen Richtung verschoben sind, und daß die Filter (50 bis 52) erste bis dritte Filter aufweisen, die jeweils in den Strahlengängen der ersten bis dritten Reihen der kleinen Linsen der Gruppe von Linsen angeordnet sind, um so Licht einer ersten bis dritten Farbe durchzulassen.
10. Optische Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Anzahl Linsenanordnungen (88 bis 90) eine Gruppe Linsenanordnungen aufweisen, in welchen jeweils eine Vielzahl kleiner Linsen in der horizontalen Abtastrichtung angeordnet sind, um zwei Reihen kleiner Linsen zu bilden, wobei die Gruppe von Linsenanordnungen ein Doppelbild einer Vorlage auf der Abbildungsfläche (81) erzeugt, wobei das Doppelbild Bestandteile hat, welche um eine vorherbestimmte Größe in der horizontalen Abtastrichtung versetzt sind, und daß ein durchlässiges Grünfilter (91) und ein durchlässiges Magentafilter (92) in Strahlengängen der ersten und zweiten Reihen kleiner Linsen der Gruppe Linsenanordnungen angeordnet sind.
11. Optische Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß jede der Linsenanordnungen (88 bis 90) so ausgebildet ist, daß eine Gruppe kleiner konvexer Linsen als Einheit ausgebildet sind.
12. Optische Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß jede der Linsenanordnungen (101 bis 104) so ausgebildet ist, daß eine Gruppe kleiner konvexer Linsen als Einheit an einer Innenfläche einer ebenen Glasplatte dadurch ausgebildet sind, daß eine Substanz mit einem Brechungsindex, welcher von demjenigen eines Glases der Platte verschieden ist, von deren Oberflächen aus diffundiert wird.
13. Optische Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, daß dreifarbige Trennfilter (42 bis 44) in einer horizontalen Abtastrichtung entsprechend Bildelementen angeordnet sind, daß eine Anzahl Linsenanordnungen (71 bis 74), in welchen jeweils eine Vielzahl kleiner Linsen in der horizontalen Richtung angeordnet sind, um n Reihen kleiner Linsen auszubilden (wobei n ? 2 ist), und Filter (50 bis 52 vorgesehen sind, welche in Strahlengängen der kleinen Linsen der Reihen der Linsenanordnungen (71 bis 74) angeordnet sind, und Licht von nur jeweils entsprechenden Farben durchlassen, wobei der Abstand zwischen Mitten benachbarter Linsen in ersten bis n-ten Reihen kleiner Linsen in zumindest einer Linsenanordnungen (73, 74) aus der Anzahl Linsenanordnungen so eingestellt ist, daß er derselbe ist wie derjenige von ersten bis n-ten Reihen kleiner Linsen in den restlichen Linsenordnungen der Anzahl Linsenanordnungen, die kleinen Linsen der n-ten Reihe der zumindest einen Linsenanordnung (73, 74) von den kleinen Linsen der n-ten Reihe der kleinen Linsen der restlichen Linsenanordnungen (71, 72) um p/3 (wobei p ein Bild-Element-Abstand ist), in vertikaler Abtastrichtung versetzt ist, die Abstände zwischen den Reihen kleiner Linsen der zumindest einen Linsenanordnung (73, 74) so eingestellt ist, daß er um p/3 größer ist als derjenige zwischen den Reihen kleiner Linsen der restlichen Linsenanordnungen (71, 72), wobei die Linsen in zumindest einer der Anzahl Linsenanordnungen nicht vollständig bezüglich der Linden der restlichen Linsenanordnungen koaxial sind, und die Anzahl Linsenanordnungen (71 bis 74) entlang der optischen Achsen der kleinen Linsen einander überdeckend angeordnet sind.
EP84113138A 1983-10-31 1984-10-31 Dokumentenabtaster und optische Vorrichtung dafür Expired EP0143357B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP204032/83 1983-10-31
JP204033/83 1983-10-31
JP58204032A JPS6096062A (ja) 1983-10-31 1983-10-31 書画読取装置
JP204034/83 1983-10-31
JP58204033A JPS6096063A (ja) 1983-10-31 1983-10-31 書画読取装置
JP20403483A JPS6095513A (ja) 1983-10-31 1983-10-31 光学装置

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EP0143357A1 EP0143357A1 (de) 1985-06-05
EP0143357B1 true EP0143357B1 (de) 1988-06-08

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783696A (en) * 1986-12-05 1988-11-08 Hewlett-Packard Company Color image input apparatus with various elements having matched apertures
JPS63158970A (ja) * 1986-12-23 1988-07-01 Matsushita Electric Ind Co Ltd 画像読み取り装置
DE3817559C1 (de) * 1988-05-24 1989-12-07 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
JPH0454682A (ja) * 1990-06-22 1992-02-21 Toshiba Corp 立体画像処理方法及びその装置
US5686960A (en) * 1992-01-14 1997-11-11 Michael Sussman Image input device having optical deflection elements for capturing multiple sub-images
GB9301192D0 (en) 1993-06-09 1993-06-09 Trott Francis W Flower shaped mechanised table
US20060202104A1 (en) * 2005-03-14 2006-09-14 Microalign Technologies, Inc. Contact-type monolithic image sensor
JP5446521B2 (ja) * 2009-07-06 2014-03-19 株式会社リコー 撮像装置
JP5789499B2 (ja) * 2011-11-25 2015-10-07 株式会社沖データ レンズアレイ、レンズユニット、ｌｅｄヘッド、露光装置、画像形成装置及び読取装置
US20180023943A1 (en) * 2016-07-21 2018-01-25 Sony Corporation Optical apparatuses and method of collecting three dimensional information of an object

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260178B (de) * 1964-11-20 1968-02-01 Agfa Gevaert Ag Fotografische Kamera mit einem rasterartigen Abbildungssystem
DE1203115B (de) * 1964-11-20 1965-10-14 Agfa Gevaert Ag Belichtungsanordnung fuer Kopiergeraete
DE1298407B (de) * 1967-11-27 1969-06-26 Agfa Gevaert Ag Belichtungsanordnung fuer Kopiergeraete
US4007985A (en) * 1974-10-16 1977-02-15 Personal Communications, Inc. Multiple function recording and readout system
US4012116A (en) * 1975-05-30 1977-03-15 Personal Communications, Inc. No glasses 3-D viewer
DE2741467A1 (de) * 1977-09-15 1979-03-29 Philips Patentverwaltung Verfahren und anordnung zur erzeugung ineinander verschachtelter farbauszuege von farbobjekten
US4264921A (en) * 1979-06-29 1981-04-28 International Business Machines Corporation Apparatus for color or panchromatic imaging
JPS5672575A (en) * 1979-11-19 1981-06-16 Toshiba Corp Picture input unit
US4321628A (en) * 1980-04-02 1982-03-23 Xerox Corporation Scanning apparatus
US4432022A (en) * 1980-04-14 1984-02-14 Canon Kabushiki Kaisha Original reading apparatus

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US4676596A (en) 1987-06-30
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